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Air ventilation pvc pu pp pe eva flexible hose duct pipe production line making machine we ,qingdao haosaite plastic machinery co.,ltd , specialized in researching , studying, designing , and making all kinds of soft , flexible and spiral and different of plastic hose making machinery .
Jul 10, 2017 · most of the addition polymers (pe, pp, ps, pvc) don’t absorb moisture, but their additives, like fillers and pigments, might. in such cases, anything over around 0.1% h2o by weight will boil off as it leaves the die and create dotted lines or bubbles on the extruded surface.
That having been said, very few fumes reach this temperature as they are usually mixed with ambient air at the suction end. if galvanised ventilation ducting is used in fume extraction, chemicals in the gasses/air can very quickly eat away at the material. most fume cupboard systems use pvc ventilation pipe and fittings for extraction.
Crosslinked pe foam production line chemically cross-linked pe foam sheet production line is to produce a very fine closed-cell structured, chemically cross-linked polyethylene foam sheet, in continuous roll, with smooth, aesthetic surface on both sides from polyethylene a cross-linking and blowing agents, and some other purpose additives.

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